Statistical investigation of chemically peculiar stars. I. The stars with known periods.

The data on the rotation periods of 220 chemically peculiar stars of the upper part of the main sequence have been collected from the literature. Stellar radii, equatorial rotation velocities and inclination angles of the rotational axis to the line of sight are estimated from the effective temperatures obtained from photometric and spectral data. It is found that the rotation velocity distribution is exponential with scale of 80 km/s, and the orientation of the rotation axes does not contradict the assumption about the same probability of their distribution.